Understanding subscribe method of stratum

[konradp]

Hi,

Here: http://mining.bitcoin.cz/stratum-mining there is an example of answer to the "subscribe" method:
{"id": 1, "result": [[["mining.set_difficulty", "b4b6693b72a50c7116db18d6497cac52"], ["mining.notify", "ae6812eb4cd7735a302a8a9dd95cf71f"]], "08000002", 4], "error": null}\n

I understand everything, except: "mining.set_difficulty", "b4b6693b72a50c7116db18d6497cac52", can somebody tell me what is this?

Edit: yes I did read all(?) the topics related to stratum, including this one: https://bitcointalk.org/index.php?topic=108533.0 but I couldn't find any information related to this line.

Why none of my stratum-related questions are answered... Is this a top secret project or what...

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[eleuthria]

Ignore it.  In no implementation of stratum will you see the response identified on that page with mining.set_difficulty and a weird hex string after it mixed with the subscribe response.  You'll see the mining.notify/ae6812..../extranonce1/extranonce2 size.

https://www.btcguild.com/new_protocol.php

[konradp]

Thank you! Finally someone answers my questions about stratum:)